If you are getting error messages that say Direct3DX9 file is missing when you try to play some games, there is no need to go for a new download of the game and reinstallation. You can see these error messages with different text such as Microsoft.directxdirect3dx.dllmissing, dll not found, file not found, and so on. These messages only mean that you have some issues with DirectX in your computer. This particular file is one of the many such files in DirectX. Most of the games utilize DirectX for their graphics. You can get Direct3dx9 free download from here to enjoy your video games.